Tripping mechanism for printing-machines



L. E. MORRISON. TRIPPING MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED FEB. 21, 1920.

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APPLICATION FILED FEB. 21., 1920.

Patented Oct. 11, 1921.

3 SHEETS-SHEET 2.

L. E. MORRISON. TRIPPING MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED FEB. 2|, 1920.

Patented Oct. 11, 1921. 3 SHEETS-SHEET 3.

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INVENTOR flag/7M0 aw ATTORNEY of printing UNITED STATES,

PATENT OFFICE.

Lnwrsn. Monnrson', or NEWARK, NEW JERSEY, ASSIGNOR TO nnvrsnnn AND s. nemns PLUM, an, or MADISON, new JERSEY.

[DRIPPING MECHANISM FOR PRINTING-MACHINES.

Specification of Letters Patent.

Patented oca'11, 1921.

Original application filed May 29, 1919, Serial No. 300,702. Divided and this application filed February 21, 1920. Serial No. 360,332.

To all whom it may concern:

Be it known that I, Lnwrs E. MORRISON, citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Tripping Mechanisms for Printing-Machines, of which the following is a specification.

Thisinvention relates to improvements in tripping mechanism for printing machines of the type shown in my pending appl1cation, Serial Number 300,702, filed May 29th, 1919, from which application this one is divided out;

The object of the invention is to provide a generally improved tripping mechanism particularly well adapted for use in connection with an automatic printing machine such as shown in the said application. The invention, however, is not restricted in its use or application to any particular make ress, but is intended broadly for use on p aten presses of theChandler and Price type, well known in the-art.

Another object of the invention is to pro vide a tripping mechanism adapted to operate automatically in connection with auto matic paper separating and feeding means and automatic gripping or delivery means and designed to operate to trip or stop the press when both or either of said means fail to act. In addition, the tripping mecl1- anism is designed so as to permit of manual operation of the usual tripping means found on presses of the type mentioned.

lVith these and other objects in view the invention com arises a tripping mechanism as hereinafter C escribed and as illustrated in the accompanying drawings in which.

Figure lis a general side view of a platen printing press embodying the invention with details omitted.

' Fig. 2 is a front view of the press looking in direction of arrow 2 in Fig. 1.

Fig. 3 is' a detail view of parts of the tripping mechanism. I

Fig. 4 is a-view of the tripping mechanism looking in the direction of the arrow 4 in Fig. 3.

Fig. 5 is a sectional view of parts shown in igs 3 and 4c.

Fig. '6 is a detail view of the lower end of the tripping link. r

Fig. 7 is a view on line 7-7 of Fig. 6.

Fig. 8 is a diagrammatic view of the'tripping mechanism and associated parts.

F1g. 9 is a detail view of parts of the electrlcal connections. 3

Fig, 10 is a detail view looking in the direction of arrow 10 in Fig. 8.

The press as illustrated in outline only in Flgs. 1 and 2 is a typicalplaten or job press. The frame of the press. is denoted in gen eral by the reference-numeral 3. 4 is the drlving shaft; 5 the platen pivot; 6 the platen; 7 the form member pivoted at 8; 9 indicates the inking mechanism; 10, 10 the connecting rods and 12 the platen looking cam which appears as and also acts as a crank disk as shown. 13 is the tripping means usually found on presses of this type and 14 is the normally operated tripping lever. All of the aforesaid parts and their function are well known in the art.

On the left side of the press and suitably secured to the frame thereof is a bracket 15 having a rearwardly inclined upright 16 and a depending forward portion or bracket 17. Ch the right side of the press there is a similar bracket 18, Fig. 2, having an upright 16 and a bracket 17.

In addition the bracket 18 has a forwardly inclined upright 19. The numeral 24: denotes a paper feed table which is pivotally supported on the bracket 19 by means not disclosed herein. The feed table rests normally on the said two uprights 16, 16 on shoulders 26 thereon. The paper 52 is supported on the feed table 24: by means of a paper board 10.

The top sheet is separated from the pile of paper 52 by a suction nozzle 53 secured to a rod 54 supported in an arm 56. To the ing been picked up by the n0zzle, is transferred from the pile and to the platen as will be 11IlCllSl1OOCl.' 61, 61 are cooperating stops on the arm 56 and support 59 respectively whereby the arm may be swung upward into the dotted position shown in Fig.

1, and thus the nozzle moved out of the way.

' per carriage 112 which slides on rods 110 under the feed table 24. Secured to the gripper carriage is a sliding bearing 119 which slides on a rod 120. 124 is a gripper carriage operating link which is pivoted to said sliding bearing 119 and to the inking mechanism 9 at 125 upon the frame there of; see Fig. 1.

It will therefore be understood that as the press opens, the gripper is moved toward the platen to seize the sheet and remove it therefrom. And as the press closes, the gripper moves forwardly under the feed table and is opened at the proper time to drop the sheet in a suitable delivery receptacle, not shown.

Means are provided for trippingthe form or tripping the press as it is usually stated. In this instance, means are provided for operating the usual tripping lever 14 to actuate the usual tripping mechanism on the press in case the suction nozzle fails to pick up a sheet and feed it to the platen, and in case the gripper fails to remove the printed sheet from the platen. See Figs. 1, 2, and 3 to l0'inclusive.

Referring to Fig. 1, the form 190 is as usual connected to an eccentric shaft 191 by means not shown. 192 is an arm secured to the'shaft and which arm is connected by a link 193 to another arm 194 fast to a shaft 195. .The latter is provided with a slotted arm 196. 197 is a pin which plays in the slot in the arm 196 and which pin is fast in a locking arm 198 mounted on a second shaft 199. Outside the frame the shaft 199 carries an arm 200 connected by alink 201 to the tripping lever 14- which is pivoted at 202. All of the foregoing is well known in the art.

When the tripping lever 14 is thrown by the operator-to the left in Fig. 1-the shaft 199 is rotated anti-clockwise. The shaft 195 is rotated clockwise. The link 193 is lifted and swings the arm 192 upward, thereby rotating the eccentric shaft 191 to withdraw ing elements.

or trip the form 190, all in a well known manner.

The present automatic tripping and untripping mechanism comprises the follow- See Figs. 3 to 10 inclusive. To the bottom of the tripping lever 14 is pivoted a head 210 by means of a stud 211.

The head is provided with a slot 212. 213.

is a trip cylinder secured to the head 210 by screws 214. Within the cylinderthere is a plug 215 having a shoulder 21.6. '217 is a spring urging the plug outward. The cylinder is connected by a hose 218 to the pump 219, and is provided with a slot 220 adapted to receive the latch 221 which is pivoted on said cylinder at 222. The latch is urged inward in said slot 220.and against the'plug 215 by a spring 223. The latch also carries a roller 224 and is operated by the tripping link 225 which is ivoted to the U-shaped bracket or frame 5 at 226, see Fig. 1.

The link 225 is adapted to slide in the slot 212 in the head 210 and is provided with a shoulder 228 adapted to take against the shoulder 216 on the plug 213 and a ledge 229 whereby said link is kept occupying the full depth of the slot 212 as will be understood from Fig. 5. The link carries a fixed unlatching finger 230 and a movable 'unlatching hook 231 pivoted at 232 and adapted to be operated by a magnet 233. The finger 230 is adapted to contact with the roller 224 to depress it so as to move the latch out of the slit 220. Similarly, the hook 231 is adapted to contact with a post 234 on the latch to lift the latter to the same effect. 235 is a slot in the link 225 and 236 a button or projection.

Mounted on the frame of the press is an air release 240, Fig. 8, comprising a fixed bracket 241 having an air hole 242 connected to the pump by hose connection 243. Pivoted on said bracket 244 is an arm 245 having a hole 246 through which a link 247 is adapted'toslide. The link has a notch 248 and the arm 245 has a lever 249. The latter has a pin 250 which passes through a hole in the arm 245 and into the hole 246 through which the pin is adapted to enter the notch 248 in the link 247. The lever 249 is pivoted at 251 and a spring seated pin 252 acting against the short arm 253 of the lever249 normally keeps the pin'250 down in engagement with the notch 248 in the link 247.

254 isan eye in the lever 249 connected by a chain 255 to a switch lever 256. The pump 219 is pivoted to the floor at. 257 and. the piston rod 258 from the pump piston is connected at 260 to the gear 261 on the press.

Referring now to Fig. 2, it will be seen that if the suction takes place through the hose 300, the nozzle 53 picks' up a sheet. Suction then also occurs in the trip cyline der 213, whereby'the plug 215 is sucked or r and unlatches the plug, which thereupon is'moved out by-the spring 217 and now rests against the surface of the link 225.

After printing the press again opens and,

if suction occurs, the above mentioned'operation is repeated and the link 225 has at no time been in operative connection with the tripping lever 14.

That is to say, normally the plug 215 projects into the path of the shoulder 228 on the link 225 and if it remained in that position the shoulder 228 would catch said plug and move the tripping lever and trip the press. But because the suction operates properly, the plug is sucked out of the path of the shoulder 228 and latched. But as soon as the said shoulderhas passed the plug, the latch is operated by the'link finger 230 to unlatch the plug which then moves outward ready for the next operation. And inasmuch as the tripping mechanism has not operated, the air release 240 remains undisturbed.

If, however, the suction fails to act so that air enters through the nozzle 53, the plug 215 will remain in its projected or outward position as shown in Fig. 5. Consequently, when the press is closed for printing, the shoulder 228 on the link 225 will catch said plug, that is, the link will become operatively connected with the tripping lever and throw the latter, thereby tripping the press, and atthe same time, the operation of the tripping mechanism will cause the shaft 199 therein to be rotated anti-clockwise as explained and through an arm 292 fast on said shaft, the link 247 connected to the air release will be operated and the arm 245 thereof will be moved forward on the pivot 244 and the air hole 242 will be uncovered and air will pass into the pump. Continuing the operation of the press, on the opening stroke, the button 236 on the link 225 will abut the head 210 fast to the tripping lever and carry the latter back to a position, thereby untripping the press. On the next stroke, the press will again be tripped, because air having entered through the air release, suction will again fail, so that after one tripping because of failure of the suction, the press will continue tripping until the cause of the trouble is located and attended to and the air release set to cover the air opening 242.

' The air release is set or rendered inactive as follows. When the operator discovers that the press is tripping, he lifts the switch handle-or whatever other element the chain 255 is attached to-thereby lifting the lever 249 and lifting the pin 250 out of engagebut insulated therefrom as seen in Fig. 8.

ment with the socket in the link 247. The latter will therefore no longer operate the arm 245 to uncover the air hole. The arm 245 is moved into normal position by the collar 291 on the link 247, Fig. 10.

The tripping mechanism is also arranged to trip automatically in the event that the gripper fails to take a sheet from the platen, as for instance when the sheet is torn and cannot be reached by the gripper or for other reasons. In this case the 'unlatching of the latch 221 so as to permit the plug 215 to move into the path of the shoulder 228 on the link 225 is done electrically in advance of the movement of said shoulder.

Accordingly, an electric circuit is established on the press comprising the following elements. A thin strip of brass 265 is attached to the movable jaw of the gripper,

'85 A wire 266, passes from said gripper contact 265 to a contact 267 on the gripper carriage Fig. 9. During the operation the contact 267 slides against a brass spring contact 268 carried by the feed table and which makes contact with a spring seated button 269 carried by the frame. From the button a wire 270 leads to the battery 271. Fig. 9, merely illustrates the manner in which the circuit is established between the feed table and the frame.

In Fig. 8, the contacts 267 and 268 are shown diagrammatically and the circuit is as follows. From the battery 271, wire270, contacts 268 and 267, wire 266 to the gripper contact .265. From the other side of the battery, to the switch 256 to the magnet 233 and to ground on the frame.

WVhen the gripper moves in over the platen to take a sheet, contact is established between contacts 267 and 268. If there is no sheet on the platen for the gripper to take, closing of the gripper establishes the circuit as follows. a v" From battery to gripper contact 265. through the frame to the magnet 233 to the switch and back to thebattery. Conse-- quently the magnet is energized and when the press closes for printing the hook 231 will be in the path of the post 234 on the latch,-lift and keep the latter away (dueto the round shape of hook 231) from the plug 215 which will be caught by the shoulder 228 and the press tripped. This in turn operates the air release and prevents further feeding of the paper to the platen. Thereafter the switch is opened to reset the air. release and break the circuit. The trouble is thereafter attended to. 1 The press then commences to operate again andthe switch is leftopen until after one sheet has been fed to the platen, after which the switch is closed. If the switch is closed sooner, the press will again be tripped because there is then no sheet for the grippers to act upon.

scope of the appended claims.

V VVhileoperating by hand there is of course no suction and consequently the plug 215 in the trip cylinder would remain in the path link 276 is at its bottom, see Figs. 4: and 5,

pivoted to a bell crank 278 pivoted at 279 The bell crank 278 has a nose 280 adapted to engage a pin 281 which in turn is designed to contact with the plug 215. hen operating the press for hand feeding, the hand grip 277 is tied down as it were to the gripping lever by a ring or loop 283 to lift the link 276. This in turn operates the bell crank 278 and the nose 280 thereof moves the pin 281 inwardly and pushes the plug 215 back into. the cylinder 213. Thus, during hand operation, the plug is kept permanently out of the way of the tripping shoulder 228and as the link 225-moves with theform member of the press, it slides idly past the tripping lever without tripping. If the operator desires to trip the press he throws the tripping lever as usual. In Fig. 5 parts of the bell crank 278 are shown dotted for the sake of clearness.

It will be seen, therefore, that in the event the suction means for picking up the paper or the gripping means do not function properly, the press 'will be automatically trippechand that these mechanisms do not interfere with the manual operation of the trip. It will further be understood that changes may be made in the detailed construction. and arrangement of the mechanisms herein disclosed without departing from the principle of the invention. or the I claim V o 1. The combination of a tripping mechanism, a tripping lever for actuating it, a

link foroperating said tripping lever, a

member mounted on said tripping lever and -normally in the path of said link, suction means for moving said member out of the path of said link, a latch for locking said member in its removedposition and means on said link for unlatching the said member.

2. The combination of a tripping mechanism, a tripping lever for actuating it, a link for operating sa1d tr1pp1nglever,a membermounted on said tripping lever, means for normally maintaining said member in active position in the path'of said link, suction means for moving said member out of the path of said link, a latch on said tripping lev'er for locking said member in its removed position and means on said link for unlatching said member 3. The combination of a tripping mechanism, a tripping levertherefor, a movable link for actuating .said tripping lever, a member on said tripping lever, a spring for inactive position, a latch pivoted on said tripping lever, a spring for operating said latch to lock said member in inactive position and means'on saidlink for unlatching the said 'membe'r. Y

1.- The combination of a tripping mechanism, an operating lever therefor, a member mounted on said lever, a spring for holding said member in normal active position, a link having a shoulder adapted to engage said member inits active position to operate said lever, suction means for moving said member into inactive position, means for maintaining said member in inactive position while the said link moves past the same and means on said link for restoring the said member. a I c 7 5. The combination of a tripping mechanism, an. actuating lever therefon; a link, a movable member for operatively connecting said link and the said lever to operate the latter, suction means-for moving said connecting member into inactive position, a latch for locking said member in active position and electrically operated means for unlatching the said connecting member. 6. The combination ofl a tripping mechanism, anactuating lever therefor, a link, a

nccting member. into inactive position, a

latch on' said tripping lever for locking said 'member in inactive position and electrically operatedmeans on the said linkforunlatching the said connectingmember.

7. The combination of a tripping mecha nism, an actuating lev ervtherefor, a movable mcmber, meansfor operatively connccting the latter and the said lever, suction means for rendering said connecting means inactive, and aspring formaintaining said connecting means in active position if said suction:means.fails to operate.

8. In a printing press thercombination of a tripping mechanism, a suction operated. sheet separating mechanism, a pump for applying suction thereto, ;mean including an electric circuit and, a switch forcausing the said tripping mechanism to act when the said suction mechanism fails to operate,

an air release for supplying ir to the pump under the piston'thereofl when the said tripping mechanism has been actuated, and connecting means between said air release and the said, switch for automatically rendering said release inoperative whenthe said circuit is broken by operation of the I said switch. I

, LEWIS MORRISON. 

